The Coral "holey basket" thread

As I listen to these CHB Frugal Horns today I'm at a lost for words. With all the work on other projects I've not spent time with them in a long time and not in their current location. The clarity and detail is just shocking. If I could only have one pair of box speakers it would be these. If anyone is considering another enclosure save yourself the effort and build the CHB Frugal Horn Mk3's. You'll thank me later.

P1010012.jpeg
 

gable

Senior Member
As I listen to these CHB Frugal Horns today I'm at a lost for words. With all the work on other projects I've not spent time with them in a long time and not in their current location. The clarity and detail is just shocking. If I could only have one pair of box speakers it would be these. If anyone is considering another enclosure save yourself the effort and build the CHB Frugal Horn Mk3's. You'll thank me later.

View attachment 23471
Where are you crossing the Neo3 in? How do you like it?

Those Frugal horns look great, very well done.
 
I use a 1.5uF cap on the tweeters to filter the LF and power both the CHB's and tweeters with a SET amp. The CHB's run full range without any filters or corrective circuits. The tweeters add some sizzle to the top end which some folks may or might not need. I used them in OB's before so with the back plate removed they radiate in both directions. I listen to mostly jazz and appreciate how they reproduce the shimmer of high-hats. Thanks
 

gable

Senior Member
I use a 1.5uF cap on the tweeters to filter the LF and power both the CHB's and tweeters with a SET amp. The CHB's run full range without any filters or corrective circuits. The tweeters add some sizzle to the top end which some folks may or might not need. I used them in OB's before so with the back plate removed they radiate in both directions. I listen to mostly jazz and appreciate how they reproduce the shimmer of high-hats. Thanks
I've used Neo3's in exactly the same way many times. They are a fantastic tweeter, and can add just the right amount of hf, ime.
 

rogerfederer

Junior Member
pretty sure this is a tc630; here is pic from webz: View attachment 23394

this blog says the tc 630 has the coral holey basket 16 ohm version:
this CAM listing says the same thing: https://www.canuckaudiomart.com/details/221573-sony_tc630_reeltoreel_two_units/

just called the listing and left a message; has been on CL for 20 days but ad still up...

and, he still has it; confirms is a tc630; agreed to test the speakers
OK, now have deal to buy them and pick up on saturday; almost all my stuff in storage still so won't really be able to mess w them much but may be able to hook them up to my temporary system in their present cabinets; will report
i wonder how they would sound in my aiko horns?
 

gable

Senior Member
OK, now have deal to buy them and pick up on saturday; almost all my stuff in storage still so won't really be able to mess w them much but may be able to hook them up to my temporary system in their present cabinets; will report
i wonder how they would sound in my aiko horns?
AIko's are double BLH's?
 

StevenZ

Active Member
Okay, I'll do my best here to describe what I heard when swapping all 3.

Current iteration of my system consists of Chromecast Audio outputting optical into Esoteric D700 (Modded by Stephen Sank) and Audio Nirvana EL84 integrated amplifier. Deezer is what service I'm streaming from.

Fair warning, these are my impressions, yours may vary. The enclosure all are tested in is a rookie's first stab at Bassbox Pro, ported somewhere between 40-60hz -3db (I can't remember how I tuned this enclosure). Bass results will obv. be skewed in the favor of the Alpair.

Starting with the Mark Audio Alpair 7 Gen3 drivers. I know these well. They've been my gatekeepers for many years now. Any new piece of gear, cables, speakers etc. are tested on these drivers first. They are the most revealing speakers I own to date.

The Mark Audio's strengths are the ability to produce "real" bass from a small driver and to not need a tweeter either. They're extremely well balanced and image like absolute champions. Their sound is a little on the cool side as I find most metal-coned drivers can be. Therefor I find that sometimes on vocals they can be a little bit thin sounding. Given a proper enclosure (not mine) this isn't quite the case as much, but you'll still get the slightest hint that they're metal coned. I've had these speakers and others in the MA line-up in bookshelf and "Pencil/SuperPencil" enclosures. The bigger the better is what I've found. Dave @ Planet 10 has come up with some great enclosures.


Enter the Realistic FE103 from Radioshack.

I didn't really have any interest in picking up new drivers but after seeing the FE103A being re-introduced by Fostex on Madisound's website I started digging a little. I know the Realistic isn't exactly the same, but some say it's not bad. And well the price was right for this pair. NOS but not perfect. The cloth surrounds have some weird ripples in them but there's no voice coil rub so I'm guessing it's just cosmetic. Fingers crossed.

Anywho, popped them into the enclosures (the bolt pattern is the same for all 3 drivers) and fired them up. Played some Damien Rice and Joanna Newsom two of my favorite vocal artists to hear on new speakers. I was shocked right out of the gate how good the vocals were. Like, really shocked. It was good, almost ESL-like. Imaging was almost as good as the Alpairs. They don't seem to need a tweeter for the music I listen to as they go high enough. These drivers are a little warmer sounding than the Alpair but it was surprising how close the two were in sound. The Realistic had a little more meat on the bones in the vocals though and have a little more texture to wooden instruments.

Not surprising, there's virtually zero bass. These drivers don't even try. Could it be stiff suspension? Sure. Is it probably my enclosure? More than likely. But I won't hold this against them. For the price of entry I'm stoked and i'm sure a proper enclosure would help dramatically.

These speakers gave one of the most pleasurable listening to my favorite CD; All-Star Percussion Ensemble. In one of the tracks there's a kalimba and I swear with the Realistic speakers playing I could not only hear the fingers sliding off the keys but it was almost as if the instrument was being held right beyond the speakers. Hearing the slight reverb from the key and the kalimba body. Both the Realistic and the Mark Audios do a great job of projecting the music away from the speakers themselves; pulling that "disappearing act" with ease.



And lastly the Corals.

Mine are in great condition. Supple spider and surrounds. Again, same bolt pattern.

These drivers are the vocal winners in this battle. These have the edge over the other two, but not by much. What they have over the Alpair is a richness. You can hear more body. It's just more natural sounding. Compared to the Realistic they're a bit fatter sounding and not quite as fast but still enjoyable. Surprisingly these have the poorest top end extension of the 3. Alpair being the best, Realistic being second, Corals an easy third. They don't have the snap and speed I was enjoying with the Realistic or Alpair.

Bass response in the test cabinets was surprisingly good. Not perfect, but much better than the Realistic drivers. Something I thought was interesting here as well. The Corals of all 3 have a way of filling the room better than the others. Being that the "rig" is set up on half of a clothes dresser I'm not exactly going to be locked into the sweet spot (though I have a chair I can use if I want to) so I'm walking around the room doing other things and these Coral drivers sound great no matter where I'm at in the room. However, of all 3 drivers these seem to not do the disappearing act as well. In some of my jazz music I found that instead of casting instruments into space behind the drivers, it almost seemed like they were glued to the drivers; meanwhile vocals were perfect center. I checked polarity and saw no issues.

I'll work with the Corals more to get them into an adequate enclosure eventually and same with the Realistic drivers to repeat this experiment.

I've learned that all 3 drivers are pretty different from one another and none of them are the losers here. Depending on what you're after any one of these could be your small driver endgame speaker. Each have their strengths and are worth working with to maximize potential.

If I could take the Alpair's top to bottom extension, the Realistic's texture and the Coral's body/weight I think I'd have the perfect sound. *sigh* I wish.
 
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